Organize my Exhibit slides under a sections? Or headers?

[lwilcock1]

Is there a way to organize slides in the Exhibit app? I have a list of slides (that can be organized by being groups in a web map), but I can't find a way to add a header or section or group for the slides.

Here is a screenshot of Exhibit slides:

Here is how I would love to organize this (shown with web map groups):